Feed-water heater for steam-boilers



(No Model.)

EJJ! HALL. EEED WATER HEATER FOR STEAM BOILERS. N01 272,684. PatentedF'eb.20,1883.

N4 PETERS. Phnhvuihcgnphu, wnhin lan. D. c.

UNITED TATES EDWARD J. HALL, OF

PATENT OFFICE.

BUFFALO, NEW YORK.

FEED-WATER HEATER FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent.No. 272,684, dated February20, 1883.

Application filed October 9, 1882. (No model.)

10 all whom it may concern Be it known that I, EDWARD J. HALL. of thecity of Buifalo, in the county of Erie and State of New York, haveinvented new and useful Improvements in Feedater Heaters forSteam-Boilers, of which the following is a specification.

This invention relates to improvements in that class of feed-waterheaters which consists of a feed-water-discharge tube terminating in thesteam space of the boiler, and provided at its lower end with a valvewhich opens under the pressure of the feed-pump or other feed device andpermits the feed-water to issue into the steam-space ot' the boiler in aspray, and which closes when the impulse of the feedpump ceases andprevents the steam from entering the feed-pipe. Y

The object of my invention is to render the feed device more compact andconvenient and reliable in use; and my invention consists, to that end,ofthe particular improvements which are hereinafter fully described, andpointed out in the claims.

In the accompanying drawings, Figure 1 represents my improved heaterapplied to a steam-boiler. Fig. 2 is a sectional elevation of the feeddevice. Fig. 3 is a horizontal section in line as :0, Fig. 2. Fig. 4 isa horizontal section in line f] 3 Fig. 2, looking upward; and Fig. 5 isa horizontal section in linez 2, Fig. 2.

Like letters of reference refer to like parts in the several figures.

Arepresents the shell ofa cylindrical orother steam-boiler.

B represents the tubular body of the feed device, provided above theboiler with a waterinlet, b, which is connected with the feed-pipe by aunion or other suitable coupling.

0 is an external screw-thread formed on the tubular body B, below theinlet 1), and O is a collar or flange secured to the outside of theboiler, around the opening 0, which is formed in the boiler for thereception of the feed-nozzle. The collar 0 is provided with an internalscrew-thread, which receives the threaded portion c of the feed device.By turning the feed device in the collar U the former can be adjusted soas to bring the inlet I) in line with the feed-pipe, and after havingbeen so adjusted the feed device is secured in position by ajam-nut, O.The flange (3 is preferably constructed of soft brass, to enable it toadapt itself to the curvature of the boiler.

1) represents a conical valve, which closes against a seat, d, formedatthe lower end of the tubular body B of the feed device.

6 is the valve-stem, which extends upwardly through the tubular body B,and which is provided near thel valve with curved wings f, which bearagainst the inner side of the tubular body B and guide the valve, and atthe same time cause the valve to turn at every movement, so as to changeits seat.

G represents a cap or cover, which closes the upper enlarged end of thetubular body B, and which is provided on its under side with aperforated bridge, g, in which the upper end of the valve-stem e isguided. The latter is in this manner guided near both of theextremities, and the proper movement and position of the valve withreference to its seat are thereby insured.

his aspiral spring, which surrounds the stem e and tends to close thevalve, and rests with its lower end on a perforated diaphragm, H, formedin the body B above the inlet b, and bears with its upper end against adisk, I, which is secured to the valve-stem e. The disk I is preferablyprovided on its under side with an annular recess, which forms a seatfor the spring h. The disk I is arranged at a short j, which is formedon the inner side of the body B, at the lower end of the enlarged upperportion thereof, and which limits the downward movem nt of the disk I.The latter is so adjusted on the valve-stem c that the space between theunder side of the disk and the shoulderj is equal to the fullmovementot'the valve D from its seat, so that the disk I prevents the valve fromopening farther than desired, thereby preventing undue compression ofthe spring h, and insuring the immediate return ot'the valve when theimpulse ol the feed mechanism ceases. The disk I may be perforated; orit may be replaced by arms, or otherwise constructed so that the watercan pass freely into and out of the space above the disk.

It represents a tube which surrounds the valve-stem e, opposite theWater-inlet b, and which is secured with its upper end to the perforateddiaphragm H. This tube protects the valve-stem against the lateralpressure of the distance above an annular shoulder or offset,-

water which enters the body B from the inlet 7), and which tends topress the stem toward the opposite side of the body B, and causesbinding of the stem and valve and interferes with the free movement ofthe valve. The tube 70 projects sufficiently above the diaphragm H toform a core, which prevents the lateral displacement of the lower end ofthe spring h. Upon releasing the jam-nut G and disconnecting" theinlet 1) from the feed-pipe the device can be removed 'from the boilerand cleaned, which is very important, as with some kinds of water slimydeposits are liable to occur in these feed devices, which would impairor entirely suspend the operation of the device if not removed from timeto time. The water entering the body B through the inlet 1) depressesthe valve D and issues into the steamspace in a spray all around thelower end of The tubular body B until the impulse of the feed deviceceases, when the-valve immediately returns to its seat. The spiral wingsf extend each over a fourth of a revolution and compel the valve to turnabout its axis in opening, thereby insuring constant change in thecontact-surfaces of the valve and its seat and preventing uneven Wearand leakage. The arrangement of the spring within the body B, above thevalve, dispenses with the supporting: parts formerly employed below thevalve, and renders the device more compact and less liable to get out oforder.

I claim as my invention 1. The combination, with the tubular body B, ofa valve, D, seated against its lower end, a valve-stem, 0, extendingupwardly into the body B, and a spring, h, arranged within the body Band applied to the valve-stem so as to hold the valve against its seat,substantially as set forth.

2. The combination, with the tubular body B, provided with a shoulder,j,of a valve, D, seated against the lower end of the body B, andvalve-stem 0. provided with a stop device, I, and a spring-h,substantially as set forth.

3. The combination, with the tubular body B, provided with a lateralinlet, b, of a valve,

D, stem 0, and protecting' tube k, surrounding the stem, substantiallyas set forth.

4. The combination, with the tubular body B. provided with a lateralinlet, I), of a valve, D, stem 6, spiral wingsf, spring h, stop deviceI, and protecting-tube k,'substantia1ly as set forth.

EDWARD J. HALL.

i tnesses:

JNo. J. BoNNEn, CHAS. F. GEYER.

